Final answer:
Tumors of the ovaries or adrenal cortex can lead to increased hair growth, specifically known as hirsutism, due to hormonal imbalances such as elevated levels of androgens.
Step-by-step explanation:
In the context of a tumor of the ovaries or the adrenal cortex, the most likely manifestation among the given options is increased hair growth. This symptom aligns with hormonal imbalances typically stemming from such tumors. In particular, tumors of the adrenal cortex can lead to hyperadrenocorticism, resulting in a condition known as Cushing's syndrome, which is characterized by an overproduction of cortisol. This hormone imbalance can cause a variety of issues, including hirsutism, or increased hair growth in a male pattern distribution, due to elevated levels of androgens. Similarly, a tumor in the ovaries that results in increased androgen levels can also lead to increased hair growth. This symptom is opposite to feminizing characteristics and aligns with the androgen excess that may be seen in polycystic ovary syndrome (PCOS), where overproduction of androgens by the ovaries is observed.